RFL Communications 21 Sub-MUX Manual de usuario descargar pdf (Pagina 13)

RFL SMX3/40 Page 13 of 24 Issue 2.02

User Manual

07 May 2009

DIP Switch 5 settings:

Switch 5 controls enabling of X21 port and Concatenation port, and provides some

test conditions for factory use only.

8 7 6 5 4 3 2 1

Concatenation Port X21 Port

Mode Mode

00 = Disabled 00 = Disabled

01 = Enabled as

DTE

01 = Enabled as

DTE

10 = Enabled as

DCE

10 = Enabled as

DCE

Local

Loop

0 = Off

(1 = On

Test use

only)

Spare

11 = Aggregate

Concatenation i.e.

Enabled as DTE +

Timing Signal X

Local

Loop

0 = Off

(1 = On

Test use

only)

Spare

11 = Enabled as

DTE + Timing

Signal X

• Mode: Disabled, Enabled as DTE, Enabled as DCE, Enabled as DTE +

Timing Signal X

Enabled as DTE. This is the normal setting for the X21 Port when connecting to X21

links carrying network master clock timing (eg BT Kilostream)

Enabled as DCE. This optional setting is used when the X21 link requires to be

synchronised to the network master clock signal received from a co-located

SMX3/40, (or to itself as master where network timing is unavailable). The timing

signal X is output on pins 6 and 13 (Sa and Sb). Refer to Section 14 Example 3

Enabled as DTE + Timing X. This is the normal setting for the Concatenation Port

when connecting to a co-located SMX3/40 using the Aggregate Concatenation

facility. The timing signal X is output on pins 7 and 14 (Xa and Xb).

• Local Loop: ON / OFF

Normally set to Off.

When On: data on TxD is returned on RxD, RTS is returned on CTS and DCD.

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RFL Communications 21 Sub-MUX Manual de usuario Pagina 13

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